I found the leak but don't know how to fix it...

A few years ago, I had put a shower/tub in my bathroom downstairs.

A few days ago, I noticed in the laundry room, which is behind my bathroom, the wallboard by my pipes for the shower/bath was stained due to water leakage.

I took out the wallboard, then went into my bathroom and turned the water on the in the tub and saw no leak. Then I turned the shower on and returned to the laundry room to look at the pipes and I had a small Niagra fall going on. Where the faucet connects to the copper pipes is where the leak is.

The kind of faucet I have is a one-handle-and then a smaller handle to turn the shower on.

Any ideas on how to fix?

Thanks!!

Quote:

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I turned the shower on and returned to the laundry room to look at the pipes and I had a small Niagra fall going on. Where the faucet connects to the copper pipes is where the leak is.

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You're making me guess where the leak is. It's not where the supplies connect to the valve or it would be leaking all the time. The only other copper pipe that I know of is the shower raiser. Repost your question with more details. Explain exactly where the leak is and the section of the valve that it's affecting. Regards, Tom